Combustion system for furnaces



'June 1.8, 1929. G, VAN DAAM 1,717,423

COMBUSTION SYSTEM FOR FURNACES Filed Dec. 6; 1927 2 sheets-sheet 1 Patented June 18, 1929.

UNiTED STATES GERRIT 'VAN DAAM, 0F BUFFALO, NEW YORK.

COMBUSTION SYSTEM FOR FURNACES.

Application led 'December 6, 1927.

My invention relates to combustion systems for furnaces, and is especially applicable to steam generating furnaces. The object is to provide improved method and means for supplying preheated air into the combustion chamber. The invention also comprises me. chanical means for forcing said preheated air at required periods, and for permitting the air to be induced by natural draft at other periods.

Referring to the drawings which illustrate,

' merely by way of example suitable means for effecting my invention Fig. 1 is a front elevation of the furnace. Fig. 2 is a longitudinal vertical section on line 2, 2 of Fig. 1. v Fig. 3 is a vertical cross-sect-ion on line 3, 3 of Fig. 2.

Fig. 4 is an enlarged side elevation of the blower and a heating unit,

Fig. 5 is a vertical section of the heating unit on line 5, 5 of Fig. 4.

Fig. 6 is a vertical section on line 6, G of Fi 5. imilar numerals refer to similar parts throughout the several views.

Each heating element 9- is an integral cast iron box provided with horizontal partition walls or baffles 10 staggered to secure a zigzag passage of the air from the bottom tothe top of the element. The element is also provided with parallel bars'or bolts 11 cast integral with the opposite walls of the element. These bars or bolts 11 equally spaced and are shown arranged vertically, in which case they form additional supports for t-he baffles. These bolts may if desired be arranged horizontally.

These heating elements are shown as arranged four in a row on each side of the combustion chamber and are connected together by the nozzles 12 and 13, one projecting into the other.

At the top of each heating element 9 are provided a number of downwardly projecting discharge nozzles 14.

These heating units 9 connected in series are shown as embedded in the mason work on each side of the combustion chamber 15 with the nozzles 14 projecting through the said mason Work into the said combustion chamber above the fuel bed, so that said nozzles 14 will deliver downwardly onto the fuel bed.

The first of each series of heating elements 9 is connected by a pipe 16 to a blower 17 integral with the Walls of the heating eledriven by the motor 18. The baffles 10 being` Serial No. 238,032.

ments 9 communicate heat to the air passing therethrough and the bolts or bars 11 also integral with the walls of the heating elements and with the baffles contribute largely to heating the air.

The blower motor may be controlled inrany suitable way, as7 for example, by the switch element 19, to permit the blower to operate immediately upon stokingand to run a re-v quired period thereafter; after which the blower may cease to operate and the air may be dra'wn through the blower and heating elements by the force of the natural draft.

Vhat I claim is:

1. In combination with a coal burning furnace, a plurality of heatingl elements arranged in Series and embedded in the walls flanking the combustion chamber, each element comprising a chambered body having iiankingmozzles at the bottom thereof for cooperating with nozzles of adjacent elements, said nozzles forming means for delivering air into the bottom of each element, said elements provided with horizontal battles for causing a tortuous passage to the top thereof and provided with air discharge nozzles at the top, said nozzles extending outwardly through the chamber walls and inclind downwardly for projecting the heated air toward the fuel bed-- 2. In combination with a coal burning furnace, a plurality of heating elements arranged in series and embedded in the walls Hanking the combustion chamber, each element comprising a chambered body having flanking nozzles at the bottom thereof for cooperating with nozzles of adjacent elements, said nozzles forming means for delivering air into the bottom of each element, said elements provided with horizontal baffles for causingy a tortuous passage to the top thereof and provided with parallel bars spaced apart and-integral with the walls of the element and provided with discharge nozzles at the top, said nozzles extending outwardly through the chamber walls and inclined downwardly for projecting the heated air toward the fuel bed.

3. In combination with-a coal burning furnace, a plurality of heating elements comprising cast iron chambered formations connected in series embedded in the walls iianking the combustion chamber, each chambered formation having means for receiving air into the bottom thereof and provided with horizontal battles for causing a tortuous pas- Cil sage to the top thereof and provided with discharge nozzles at the top extending through the chamber walls for projecting the flanking nozzles at the bottom thereof for` cooperating with nozzles of' adjacent elements, said nozzles forming means for delivering air into the bottom of each element, said elements provided with horizontal baffles for causing a tortuous passage to the top thereof and provided with air discharge nozzles at the top for projecting the heated air downwardly toward the fuel bed, a motor and blower arranged on the front of the furnacefwith a controlling switch for forcing air through the said heating elements at required periods. 5. In combination with a coal burning furnace,` a plurality of heating'elements comprising cast iron chambered formations arranged in two rows joined together by cooperating nozzles one engaging within another near the bottoms thereof and embedded in the flanking walls of the combustion chamber, each chambered formation receiving air into the bottom thereof and provided with horizontal batlles for causing a tortuous passage to the top thereof and parallel vertical bolts associated with the bales, said chambered formations rovided with discharge nozzles at the top for projecting the heated. air downwardly toward the fuel bed.

GERRIT 'VAN D AAM. 

